Bug 1456265 - Update the WPT expectation file, the ChannelSplitterNode tests are now passing.

--HG--
extra : rebase_source : d370b165d9af1c82e185d930568dc3eaaf296514

testing/web-platform/meta/webaudio/the-audio-api/the-channelsplitternode-interface/ctor-channelsplitter.html.ini

@@ -1,17 +0,0 @@
-[ctor-channelsplitter.html]
-  expected: ERROR
-  [X node0.channelCount is not equal to 6. Got 2.]
-    expected: FAIL
-
-  [X node0.channelCountMode is not equal to explicit. Got max.]
-    expected: FAIL
-
-  [X node0.channelInterpretation is not equal to discrete. Got speakers.]
-    expected: FAIL
-
-  [< [default constructor\] 3 out of 7 assertions were failed.]
-    expected: FAIL
-
-  [X new ChannelSplitterNode(c, {channelCount: 6}} incorrectly threw InvalidStateError: "An attempt was made to use an object that is not, or is no longer, usable".]
-    expected: FAIL
-